Switch-plate.



W. H. BURT.

SWITCH PLATE. APPLICATION FILED NOV. 23. 1914.

Patented June 22, 1915..

mmo'r.

Silhiflflifd PATEN FElC WILLIAM. H. BURT, Q1? ;WATEEEJBUEY, CONNECTICUT,ASSIGNOR TO WATERBURY MFG.

. flit, 3F VVATERBURY, CONNECTICUT, A CORPORATION.

SKETCH-PLATE.

anion To (ZZZ whom it may concern Be it known that I, EVILLIAM H. Bnn'r,a citizen of the United States, residing at Naterl'mry, in the county ofit v riavcn and State of Connecticut, have invented a new and useful.Improvement in Switch- Plates; and 1 do hereby declare the following,when tal""-n in connection with the accompanying drawings and thecharacters of reference marked thereon, to he a full, clear, and exactdescription of the same, and which said drawings constitute part ofthis'application, and represent, in

Figure l a face viewof a switch plate constructed in accordance with myinven tion. Fig. 2 a' rear view of the same. Fig. 3 a sectional View onthe line a'7) of Fig.

1. Fig. 4: a sectional view on the linec-d of. Fig. 1, Figs. 3 and ibeing scale.

This invention relates to an in switch plates or covers for switchjox'es. In the usual construction these switcl' comprise a plate with anopening which is on an enlged closed by a hinged cover or covers; and

when two covers are employed, one is hinged above the other, the twoclosing the open ing in the plate, and these covers are notched at'theiradjoining edges to form a circular opening for the passage of conductingWires.

The'object of this invention is to provide simple and convenient means'for -hinging the covers to the plate in such away that the means forhinging will not be apparent from the outside, and the inventionconsists in the construction hereinafter described and particularlyrecited in the claims.

As herein shown, I employ a switch plate 2 of the desired dimensionsformed with an opening 3 generally rectangular. Thisopening is partiallyclosed by two doors 4 and 5. If two doors are employed their meetingends are formed with semi-circular notches to provide a central opening'6 through which conducting wires may 'eX- tend; These doors are hingedto the plate by mounting in the rear of the plate trans verse bars? and8 which extend across the opposite ends of the opening 3 if two doorsare employed, or across one end if only one door is used. Thesebarslhave their ends 8 turned outward and passed through perforations 9in the plate 2 on opposite sides of the opening 3, and the outer ends ofthese )lates.

Specification of Letters Patent. Patentgfl June 22, 1915.

Application filed November 23, 1914. Serial No. 873,614. I

perforations are countersunk to provide a chamber 10 in which theextreme end 11 of the'bars may be upset whereby thebars are.

firmly riveted to the plate andi'n such a way that when the plate isfinished the ends of the bar being of the same material as the plate arepractically invisible. In the drawing it is necessary to employ aline toindicate these ends, but when the plate is fin ished the ends cannot bedetected except by the most careful inspection and frequently only withthe aid of a strong magnifying glass. Secured to the rear of the doors4: and

the rivets are upset; and like'the ends of the bars 7 and 8, the ends ofthese rivets cannot be detected when the plates are finished. By thusupsetting the rivets in countersunk recesses, a veryfirm connection ismade between the parts, and as before stated, the ends ofthe bar andrivets are ground olf flush with the face of the plate and cannot bedetected so that they do not mar the finished appearance of thecompleted switch plate. I claim:

-1. A switch plate formed with a central opening, a door adapted to fitsaid opening, said door formed with perforations coun tersunk in theouter face, a bar extending across said opening, means for holding theends of the bar, a hinge plate-secured to the rear face of the door byrivets extending through the perforations ingthe door the ends of therivets upset within the countersunk portions of the perforations in thedoor said hinge plate engaging with said barwhereby the doors arehinged, to the w plate. I

2. A switch plate formed with a central opening andwith perforations onopposite sides thereof, the outer ends of said perforations countersunk,a door adapted to fit said opening, said door formed with perforationscountersunk in the outer face of the door, a bar extending across saidopening and having its ends turned outward-and passed through saidperforations. in' the plate and theouter endsof the bar upset in thecountersunk portions of the perforations, a hinge plate secured to therear face of said door by'rivets extending through the perforations inthe door the ends of the rivets upset within the countersunk por nearthe ends thereof, bars extending across said opening at the rear of saidplate, the ends of said bars extended outward through said perforationsand upset in the countersunk portions thereof, two doors located in saidopening in the plate, said doors each formed with two perforationscountersunk in their outer faces, hinge lates secured to the doors byrivets passing t rough said perforations in the doors, said rivets upsetin the countersunk portions of said openings and the ends of the rivetsand ends of the bars ground flush with the face of the plate.

'In testimony whereof, I have signed this specification in the presenceof two subscribing witnesses.

WILLIAM H. BURT.

Witnesses J. S. NEAGLE, K. M. BnoW,N.

